libmisc: Add top to shell.

cpukit/libmisc/shell/main_top.c

@@ -0,0 +1,60 @@
+/*
+ *  TOP Command Implementation
+ *
+ *  COPYRIGHT (c) 2014.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include <rtems.h>
+#include <rtems/cpuuse.h>
+#include <rtems/shell.h>
+#include "internal.h"
+
+static int rtems_shell_main_top(
+  int   argc,
+  char *argv[]
+)
+{
+  /*
+   *  When invoked with no arguments, print the report.
+   */
+  if ( argc == 1 ) {
+    rtems_cpu_usage_top_with_plugin(stdout, (rtems_printk_plugin_t)fprintf);
+    return 0;
+  }
+
+  /*
+   *  When invoked with the single argument -r, reset the statistics.
+   */
+  if ( argc == 2 && !strcmp( argv[1], "-r" ) ) {
+    printf( "Resetting CPU Usage information\n" );
+    rtems_cpu_usage_reset();
+    return 0;
+  }
+
+  /*
+   *  OK.  The user did something wrong.
+   */
+  fprintf( stderr, "%s: [-r]\n", argv[0] );
+  return -1;
+}
+
+rtems_shell_cmd_t rtems_shell_TOP_Command = {
+  "top",                                      /* name */
+  "[-r] print or reset per thread cpu usage", /* usage */
+  "rtems",                                    /* topic */
+  rtems_shell_main_top,                       /* command */
+  NULL,                                       /* alias */
+  NULL                                        /* next */
+};

cpukit/libmisc/shell/shellconfig.h

@@ -78,6 +78,7 @@ extern rtems_shell_cmd_t rtems_shell_RTC_Command;
 
 extern rtems_shell_cmd_t rtems_shell_HALT_Command;
 extern rtems_shell_cmd_t rtems_shell_CPUUSE_Command;
+extern rtems_shell_cmd_t rtems_shell_TOP_Command;
 extern rtems_shell_cmd_t rtems_shell_STACKUSE_Command;
 extern rtems_shell_cmd_t rtems_shell_PERIODUSE_Command;
 extern rtems_shell_cmd_t rtems_shell_WKSPACE_INFO_Command;
@@ -409,6 +410,11 @@ extern rtems_shell_alias_t *rtems_shell_Initial_aliases[];
       &rtems_shell_CPUUSE_Command,
     #endif
     #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) && \
+         !defined(CONFIGURE_SHELL_NO_COMMAND_TOP)) || \
+        defined(CONFIGURE_SHELL_COMMAND_TOP)
+      &rtems_shell_TOP_Command,
+    #endif
+     #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) && \
          !defined(CONFIGURE_SHELL_NO_COMMAND_STACKUSE)) || \
         defined(CONFIGURE_SHELL_COMMAND_STACKUSE)
       &rtems_shell_STACKUSE_Command,